The calculated distance (air line) between Phumĭ Koŭk Kóng and Smach Mean Chey is approximately 173 miles respectively 278 kilometers.
By car or train, the actual journey to Smach Mean Chey is certainly longer, as only the direct route (as the crow flies) between Phumĭ Koŭk Kóng and Smach Mean Chey has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles